Importance

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Abstract

An artificial system for vision and the like in which a camera views an object and creates signals corresponding thereto which are conveyed to the nervous system of the subject and produce corresponding sensations such as phosphenes in the subject's nervous system, in which the effectiveness of the system in conveying intelligence to the subject is enhanced by converting light-corresponding and dark-corresponding portions of the camera-produced signals into dark-corresponding and light-corresponding portions of the actual sensation-producing signals. Other enhancements include producing a comparatively bright signal of the edge of the object being viewed, the signals applied by a multiplexer which applies the plurality of pulses sequentially to particular locations. Other aspects include providing the subject with a rangefinder which causes sensations that periodically vary, as in brightness, at a rate corresponding to the distance to the object being viewed as well as providing an adjustable signal amplifier to produce a controllable 'zoom' effect.

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First Claim